Home / 2,142.64-2,957.20-1,246.90

Finding the Fourth Proportional to 2,142.64, 2,957.20 and 1,246.90

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Solution

The fourth proportional to 2,142.64, 2,957.20 and 1,246.90 is: 1,720.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,142.64 : 2,957.20 = 1,246.90 : x
  2. Step 2: Convert to fraction form
    2,142.64/2,957.20 = 1,246.90/x
  3. Step 3: Cross multiply
    2,142.64x = 2,957.20 × 1,246.90
  4. Step 4: Simplify right side
    2,142.64x = 3,687,332.68
  5. Step 5: Solve for x
    x = 3,687,332.68/2,142.64
  6. Step 6: Final answer
    x = 1,720.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.